Seabrook, Texas, sits in USDA hardiness zone 9b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include okra, meyer lemon, california poppy, and artichoke; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Seabrook, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Seabrook lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Seabrook — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Seabrook — the short answer
Seabrook, Texas: USDA zone 9b, about 323 days between hard freezes, across 3K acres of city.
- USDA zone
- 9b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Jan 28
- Harris County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 17
- Harris County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~323
- Harris County normal — NOAA 1991–2020, nearest to this town
- City area
- 3K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Harris County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 9b is Seabrook's average, not your lot's — a low corner or a tree line moves it. Against Seabrook's 323-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Seabrook
Each reading below is measured for Seabrook itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSeabrook runs about 323 days between hard freezes (read from Harris County, the closest normal to Seabrook) — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredSeabrook sits in USDA hardiness zone 9b.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Seabrook is in
Seabrook sits in the Western Gulf Coastal Plain — EPA Level III, inside the wider Great Plains. That is read at Seabrook's own centroid rather than borrowed from Harris County.
What Grows in Seabrook
Every plant below cleared Seabrook's own zone 9b and its 323-day season. Each card opens that plant's Texas profile. How we score.
Is it too late to plant in Seabrook?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Jan 1; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Jan 28 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 17 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
What's on the federal record near Seabrook
Closest first, within ~10 miles of Seabrook. Listing isn't leaking, and distance isn't exposure.
- REDS FAST STOPUnderground Storage Tanks · 0.6 mi
- SATELITE CHEMICAL TRAILER FIRESuperfund · 1.3 mi
- INEOS STYROLUTION AMERICA BAYPORT PLANTBrownfields · 1.4 mi
- INEOS STYROLUTION AMERICA BAYPORT PLANTToxics Release Inventory · 1.4 mi
- INEOS STYROLUTION AMERICA BAYPORT PLANTSuperfund · 1.4 mi
- MERCHANTS STANDARDBrownfields · 1.5 mi
- AMERICAN HOECHSTUnderground Storage Tanks · 1.7 mi
- LBC PETROUNITED/ BAYPORT TERMINALBrownfields · 1.8 mi
- HOUSTON YACHT CLUBUnderground Storage Tanks · 1.8 mi
- NA INDUSTRIES PASADENAToxics Release Inventory · 1.9 mi
- AMERICAN ACRYL LPToxics Release Inventory · 1.9 mi
- ODFJELL SEABROOK TERMINALBrownfields · 2.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Seabrook's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Seabrook.
Total Sites
1,049
within ~10 miles of Seabrook
Risk Level
High
Highest-severity
13 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Seabrook
Severity Distribution
within ~10 miles of Seabrook
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Seabrook, two things run higher than the national average within ~10 miles of Seabrook — Toxics Release Inventory (156 sites) and PFAS (14 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Seabrook
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Seabrook average
Your land is one point inside Seabrook
Everything above resolves to Seabrook as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from Harris County’s record because no 30-year normal resolves at this city’s own centroid. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at city scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Seabrook Average
Seabrook Average
- ●USDA Zones 9b, averaged across Seabrook
- ●One soil character for all of Seabrook
- ●Frost dates read at Seabrook's scale: Jan 28 to Dec 17
YOUR Parcel
- ✓Your exact zone, not Seabrook's 9b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Seabrook
Pull a site-specific report for your exact address in Seabrook, Texas — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Seabrook averages can't show:
We read public map data around Seabrook — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Seabrook average
How we know this about Seabrook
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Harris County’s record, because none resolves here; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at city grain anywhere on this page — there is no city-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Seabrook
When does frost risk typically end in Seabrook?
The last hard freeze (28°F) in Seabrook typically lands around Jan 28, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about Feb 18.
When is the first frost in Seabrook?
The first hard freeze (28°F) in Seabrook typically arrives around Dec 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Dec 3, so the watching starts about Nov 17 — about 323 days after the spring freeze cleared.
How long is the growing season in Seabrook?
Measured between 28°F hard freezes, Seabrook sees about 323 frost-free days — roughly Jan 28 through Dec 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Feb 18 to Dec 3, about 288 days.
Is the soil safe to grow vegetables in Seabrook?
The federal record around Seabrook runs heavier than most — 1,049 documented sites, mostly Underground Storage Tanks entries (495), the nearest Underground Storage Tanks record about 0.6 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Seabrook?
From about Nov 17 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Dec 17 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Dec 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Seabrook's scale — its 9b band and its 323-day season. Your yard writes its own version of Seabrook's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Seabrook’s own scale
5 of the readings below were taken at Seabrook's own scale — the 3,140 acres it covers and 1,049 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Seabrook's own USDA hardiness band, zones 9bUSDA PHZM 2023
- 1,049 documented contamination sites on the federal record near Seabrook, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Seabrook's boundary and the 3,140 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9b and a ~323-day seasonGrowable Ground crop-matching engine
- The ecoregion at Seabrook's own centroid, the Western Gulf Coastal PlainUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Seabrook has no normal of its own, so its county's is the closest measured readfrom Harris County
- Soil character — no town-scale survey exists, so Seabrook's 3,140 acres read through its county's SSURGO summaryfrom Harris County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Harris County
- The growing challenges every Texas grower plans around — written at state scale, so they stay on the state guidefrom Texas
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Harris County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Seabrook's 3,140 acreswhy one lot differs from the next →
- Which side of Seabrook you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,140 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Seabrook-wide figureread your own land →
More in Texas
Wider growing context
What grows across TexasSeabrook sits outside our named growing regions, so Texas as a whole is its closest context here.
Nearby growing guides